|x+3/4| =1/2 Ét o ettttttttttt

2 bình luận về “|x+3/4| =1/2 Ét o ettttttttttt”

1. |x + 3/4| = 1/2

   => $[\begin{array}{l}x+{\displaystyle \frac{3}{4}}={\displaystyle \frac{1}{2}}\\ x+{\displaystyle \frac{3}{4}}=-{\displaystyle \frac{1}{2}}\end{array}$ 

   => $[\begin{array}{l}x={\displaystyle \frac{1}{2}}-{\displaystyle \frac{3}{4}}\\ x=-{\displaystyle \frac{1}{2}}-{\displaystyle \frac{3}{4}}\end{array}$ 

   => $[\begin{array}{l}x=-{\displaystyle \frac{1}{4}}\\ x=-{\displaystyle \frac{5}{4}}\end{array}$ 

   Vậy x in {-1/4 ; -5/4}

   Trả lời
2. |x+3/4| =1/2

   ⟺ x+ 3/4=1/2     hay x+3/4=-1/2

   ⟺ x=-1/4             hay x=-5/4

   Vậy x=-1/4 và x=-5/4

   Trả lời